/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.api.connector.source;

import org.apache.flink.annotation.PublicEvolving;

import java.io.Serializable;
import java.util.Objects;

/**
 * A container class hosting the information of a {@link SourceReader}.
 */
@PublicEvolving
public final class ReaderInfo implements Serializable {

	private static final long serialVersionUID = 1L;

	private final int subtaskId;
	private final String location;

	public ReaderInfo(int subtaskId, String location) {
		this.subtaskId = subtaskId;
		this.location = location;
	}

	/**
	 * @return the ID of the subtask that runs the source reader.
	 */
	public int getSubtaskId() {
		return subtaskId;
	}

	/**
	 * @return the location of the subtask that runs this source reader.
	 */
	public String getLocation() {
		return location;
	}

	@Override
	public int hashCode() {
		return Objects.hash(subtaskId, location);
	}

	@Override
	public boolean equals(Object obj) {
		if (!(obj instanceof ReaderInfo)) {
			return false;
		}
		ReaderInfo other = (ReaderInfo) obj;
		return subtaskId == other.subtaskId && location.equals(other.location);
	}
}
